[AArch64] Teaches clang about Samsung Exynos-M1

Adds core tuning support for new Samsung Exynos-M1 core (ARMv8-A).

Differential Revision: http://reviews.llvm.org/D15664

llvm-svn: 256829
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index bf0470b..a8f4afa 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -2107,7 +2107,7 @@
   std::pair<StringRef, StringRef> Split = Mcpu.split("+");
   CPU = Split.first;
   if (CPU == "cyclone" || CPU == "cortex-a53" || CPU == "cortex-a57" ||
-      CPU == "cortex-a72" || CPU == "cortex-a35") {
+      CPU == "cortex-a72" || CPU == "cortex-a35" || CPU == "exynos-m1") {
     Features.push_back("+neon");
     Features.push_back("+crc");
     Features.push_back("+crypto");